I have, to my attention about 5-10 users who are constantly being logged out. There is a login box that will pop up which i have never seen on my end.
Now, I have spent countless hours reading all of the threads here that report it being a problem with cache, www or non www inconsistency and settings within the APC.
I have checked everything and still can't figure this out. I have timeout set at 60 which is max. Someone maybe shed some light? These users can't complete 1-2 tasks without being asked to log back in.